Swift - struct 와 class 로 배워 보는 Call by Value / Call by Reference

// 스트럭트

struct Task {

    var title:String

    var time:Int?

}

var callTask = Task(title: "Call to randy", time: 10*60)

var reportTask = Task(title: "Report to boss", time: nil)

var todayTask : [Task] = []

todayTask += [callTask, reportTask]

todayTask[1].time = 15*60

callTask.title = "Call to toby"

print("today task = \(todayTask) \r\n callTask = \(callTask)")

// 클래스

class TaskClass {

    var title:String

    var time:Int

    

    init(title:String, time:Int){

        self.title = title

        self.time = time

    }

}

var callTask2 = TaskClass(title: "Call to randy", time: 10*60)

var reportTask2 = TaskClass(title: "Report to boss", time: 10*80)

var todayTask2 : [TaskClass] = []

todayTask2 += [callTask2, reportTask2]

todayTask2[1].time = 15*60

callTask2.title = "Call to toby"

print("today task = \(todayTask2[0].title) \r\n callTask = \(callTask2.title)")

실행 결과는

today task = [Task(title: "Call to randy", time: Optional(600)), Task(title: "Report to boss", time: Optional(900))] 

 callTask = Task(title: "Call to toby", time: Optional(600))

today task = Call to toby 

 callTask = Call to toby